EP 0642494 B1 19970319 - PROCESS FOR THE PREPARATION OF A SURFACTANT COMPOSITION COMPRISING A SECONDARY ALKYL SULFATE
Title (en)
PROCESS FOR THE PREPARATION OF A SURFACTANT COMPOSITION COMPRISING A SECONDARY ALKYL SULFATE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON EINEM GRENZFLÄCHENAKTIVEN MITTEL, DAS EIN SEKUNDÄRALKYLSULFAT ENTHÄLT
Title (fr)
PROCEDE DE PREPARATION D'UNE COMPOSITION TENSIO-ACTIVE COMPRENANT UN SULFATE D'ALKYLE SECONDAIRE
Publication
Application
Priority
- EP 9301339 W 19930526
- US 89005692 A 19920528
- US 95195592 A 19920928
- US 97465892 A 19921112
- US 98088792 A 19921124
- US 99402292 A 19921221
Abstract (en)
[origin: WO9324452A1] This invention relates to a process for preparing a surfactant composition comprising a secondary (C8 to C22) alkyl sulfate, which process comprises: a) sulfating a (C8 to C22) olefin and/or a (C8 to C22) secondary alcohol, optionally containing a primary alcohol, with a sulfating agent, b) neutralizing the sulfation product comprising alkyl sulfuric acid and dialkyl sulfate produced in step a) with a base in aqueous solution, c) heating the product of step b) to saponify the dialkyl sulfate and to remove substantially all of the water from the mixture, followed by either d) cooling the product of step c) in the presence of a nonionic organic liquid diluent to ambient temperature whereby a crystallized solid composition separates, and e) recovering and drying the crystallized solid composition of step d), or by f) contacting and mixing the product of step c) with a glycol in the presence of a nonionic organic liquid diluent, g) phase separating the lower phase from the mixture formed in step f) which contains the glycol and the composition; and the surfactant composition so prepared.
IPC 1-7
IPC 8 full level
C11D 1/12 (2006.01); C07C 303/24 (2006.01); C07C 303/44 (2006.01); C07C 305/06 (2006.01); C11D 1/14 (2006.01)
CPC (source: EP KR)
C07C 303/24 (2013.01 - EP KR); C07C 303/44 (2013.01 - EP KR); C11D 1/12 (2013.01 - KR); C11D 1/146 (2013.01 - EP)
Designated contracting state (EPC)
BE DE ES FR GB IT NL PT SE
DOCDB simple family (publication)
WO 9324452 A1 19931209; AU 4319193 A 19931230; AU 669181 B2 19960530; CA 2136651 A1 19931209; CN 1041996 C 19990210; CN 1082456 A 19940223; DE 69309054 D1 19970424; DE 69309054 T2 19970731; EP 0642494 A1 19950315; EP 0642494 B1 19970319; ES 2099446 T3 19970516; JP H07507284 A 19950810; KR 100278752 B1 20010115; KR 950701908 A 19950517
DOCDB simple family (application)
EP 9301339 W 19930526; AU 4319193 A 19930526; CA 2136651 A 19930526; CN 93106464 A 19930526; DE 69309054 T 19930526; EP 93912812 A 19930526; ES 93912812 T 19930526; JP 50019994 A 19930526; KR 19940704312 A 19941126